Tower-wagon



O. A. DAVIS. TOWER. WAGON.

(N0 Modei.)

. No. 497,952. PatenfedMay 23, 1393.

UNITED STATES PATENT OFFICE.

CHARLES A. DAVIS, OF CONCORD, NEW HAMPSHIRE.

TOWER-WAGO N.

SPECIFICATION forming part of Letters Patent No. 497,952, dated May 23, 1893.

Application filed December 26, 1891. Serial No. 416,174. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES A. DAVIS, a citizen of the United States, residing at Concord, in the county of Merrimac and State of New Hampshire, have invented certain new and useful Improvements in Tower-WVagons; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same".

The object of the invention is to provide a portable adjustable tower for over head electric wire construction and the like.

The invention consists in the combination with a platform for the use of the workman, of the various novel devices hereinafter described for supporting said platform and maintaining it level at various elevations.

The invention will be fully set forth in the following specification and claims and clearly illustrated in the accompanying drawings forming a part thereof, of which- Figure 1. is an elevation of my improved tower wagon as when closed down for transportation. Fig. 2. beinga similar view of my improved wagon showing the adjustable tower as when raised to its highest point of elevation. Fig. 3 is a sectional view of the rear portion of my improved wagon with the rear wheel in dotted lines to better illustrate the hoisting mechanism.

Similar letters designate like parts.

The wagon shown in the drawings is constructed to be drawn by horses.

A represents the wheels.

B represents the frame and C, is a seat for a driver.

D-D, are the parallel supporting beams which support a platform E, and constitute my improved adjustable tower. There are four of these beams,-two at each side of the wagon. The forward beams D, are pivoted at their upper ends to the platform as at 6, their lower ends being pivoted to the frame B, as shown at b; the beams D, are considerably longer than the others, their tops being pivoted at e, to the opposite end of the platform E, and extending considerably below the frame B; but the point b, at which they are pivoted to said frame corresponds in distance from the platform E exactly with the distance between the points 6-11 of the beams D, so that whether the said beams are vertical, as seen in Fig. 2, or inclined at the angle seen in Fig. 1, or any intermediate angle, the platform E, is as nearly level as is the ground upon which the wheels A rest.

Various methods for raising and lowering the platform are possible, one simple and effective means for which consists in providing a Windlass or drum with chains or ropes which are attached to that end of each beam D, which extends below the frame; the chains or ropes being easily wound upon the drum by a crank. Forinstance, one end of a chain or rope F, is secured by a suitable eyebolt G, attached at each side of the wagon to the axle-bed B, passing thence over a grooved pulley H, hung upon the lower end of each beam D, and thence under a roll or pulley I, mounted upon said axle bed, thence to the Windlass J, which is mounted upon the frame B, and provided with a spur gear K, meshing with a spur pinion L, driven by a crank M. Stay rods N, are mounted at n, to the axle bed B, and extending horizontally, hook into eyes d, attached to the beams D; these serve to steady the tower when at its highest altitude, together with a chain 0, one end of which is attached to the upper part of said beams D, or to the platform E, and the other to a Windlass P, mounted upon the frame B, and provided with a crank Q, for tightening the chain at any adjustment of the platform.

Having described my invention, what I claim is- 1. In an adjustable tower wagon the combination with a suitable bed-frame, of a platform supported upon parallel beams pivotally connecting said bed-frame and platform, the said parallel beams, having extensions downward beyond their pivotal points and suitable adjusting mechanism consisting of chains, connected with said extensions gearing, Windlass, and crank, all arranged subbination with a suitable bed-frame of a platarranged substantially for the purpose speci- IO form supported upon parallel beams piv0tfied.

ally connecting the same with said bed-frame, In testimony whereof I affix my signature in the said parallel beams, having extensions presence of two witnesses.

5 downward beyond their pivotal points, suitable adjusting mechanism consisting of chains CHARLES DAVIS connected With said extensions, gearing, wind- Witnesses: lass and crank, and stay rods and chains con- J. B. THURSTON, meeting the said bed-frame and platf0rm,,all CARRIE E. EVANS. 

